438191841 has 8 divisors (see below), whose sum is σ = 585798880. Its totient is φ = 291356352.

The previous prime is 438191839. The next prime is 438191849. The reversal of 438191841 is 148191834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 438191841 - 2¹ = 438191839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438191841.

It is not an unprimeable number, because it can be changed into a prime (438191849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191560 + ... + 193833.

It is an arithmetic number, because the mean of its divisors is an integer number (73224860).

Almost surely, 2^438191841 is an apocalyptic number.

It is an amenable number.

438191841 is a deficient number, since it is larger than the sum of its proper divisors (147607039).

438191841 is a wasteful number, since it uses less digits than its factorization.

438191841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385775.

The product of its digits is 27648, while the sum is 39.

The square root of 438191841 is about 20933.0322934829. The cubic root of 438191841 is about 759.5471916044.

The spelling of 438191841 in words is "four hundred thirty-eight million, one hundred ninety-one thousand, eight hundred forty-one".